Specifications include, but are not limited to: 1. Equipment and Workmanship: If the vacuum unit is to be located inside the building the vacuum system shall pull at least 3000 CFM and shall use a filtration system that incorporates HEPA filtration as a final filter. If the vacuum unit is to be located outside the building it shall be a truck mounted unit pulling at least 10,000 CFM. The compartments shall be dust tight. Air compressor must produce a minimum of 175 PSI at 17.5 CFM. All work shall be accomplished by workmen skilled and trained in HVAC system cleaning. 2. Ductwork Cleaning: Ductwork shall be cleaned by inserting a vacuum hose in one end of the duct or trunk line and, with a Reverse Jet Air Nozzle, brush all interior surface areas of the duct system including reheaters, joints, seams, splitters turning vanes, scoops, baffles, cracks and crevices otherwise inaccessible. As the RJA Nozzle is operating, the residues shall be drawn into the vacuum unit (minimum 3,000 CFM). All foreign materials such as dust, mold, soot, lint, hair, bacteria, and other air movement residues shall be removed from the area. 2.1 Duct Access Openings: Access openings shall be provided at required points of the duct system for physical and mechanical entry. These openings shall be provided as required at points adjacent to turning vanes, dampers, and other obstructions that might tend to trap or entrain dust, dirt, lint, and debris. Duct access openings shall be constructed in accordance with SMACNA HVAC Duct Construction Standards. 3. Grills and Registers: All grills, registers, and diffusers shall be cleaned with a non-toxic, disinfecting solution. Areas around registers shall be lightly cleaned by blowing with air. After cleaning, adjust all registers to insure proper air flow. Leave all areas free of any debris or dust. 4. Visual Inspection: Upon complete cleaning of each section, notify inspector for visual inspection. Upon acceptance by inspector seal with silicon caulking and neatly patch with galvanized sheet metal the same gauge as the ductwork.